We need to discuss the cars cinematic universe because I have so many thoughts

#1 Where are the cars’ brains? They are sentient so we have to assume they have brains?? WHERE ARE THEY STORED? If they’re stored behind the eyes then why do the cars have door handles??

#2 cars resemble the time period they were born in, so what was it like bodies cars existed?? Is all machinery sentient?? Just modes of transportation? I want to cry

#3 how are the cars born?? How do cars reproduce? Do they start as like toy trucks or are they big ass cars from the beginning?

#4 we can assume all transportation is sentient I guess, but then what is classified as transportation? Are bicycles sentient too? I want fucking answers @ pixar

#5 do the cars have to buy gasoline for themselves? Is there a full working economy?? Is the cars cinematic universe a capitalist society?